isc = 0;
var speedsc = 1;
function scrollsc() {
	if (document.getElementById("achtergondbeeld") != undefined) {
		isc = isc + speedsc;
		if (document.getElementById("achtergondbeeld") != undefined) {
			var divsc = document.getElementById("achtergondbeeld");
			divsc.scrollTop = isc;
			if (isc > divsc.scrollHeight - 160) {isc = 0;}
			t1=setTimeout("scrollsc()",80);
		}
//		if (document.getElementById("contentbeeld") != undefined) {
//			var divsc = document.getElementById("contentbeeld");
//			divsc.scrollLeft = isc;
//			if (isc > divsc.scrollWidth - 160) {isc = 0;}
//			t1=setTimeout("scrollsc()",80);
//		}
	}
	else
		return;
}

function handle(delta) {
	var s = delta + ": ";
	if (delta < 0)
		s += "down";
	else
		s += "up";
	//clearTimeout(t1);
	//document.getElementById('delta').innerHTML = s;
}

function wheel(event){
	var delta = 0;
	if (!event) event = window.event;
	if (event.wheelDelta) {
		delta = event.wheelDelta/120; 
		if (window.opera) delta = -delta;
	} else if (event.detail) {
		delta = -event.detail/3;
	}
	if (delta)
		handle(delta);
}

/* Initialization code. */
if (window.addEventListener)
	window.addEventListener('DOMMouseScroll', wheel, false);
	window.onmousewheel = document.onmousewheel = wheel;